The midfielder has been out of action since undergoing Achilles surgery at the start of August but the Tottenham boss hopes to have him training in a couple of weeks
The 32-year-old has not played a single minute of the current season after having an operation in August which he is yet to have fully recovered from.
Parker played through the back-end of last season receiving injections to ease the pain of the problem, and is still suffering according to the Portuguese.
"It's difficult for him as he still feels pain and is still disturbed in his recovery," Villas-Boas told reporters.
"It prevents him from being on the pitch but he has been evolving inside, in the gym, with the medical department.
"It is still within the limits of what we expected. He is making good progress and there has been less pain.
"It will take two or three weeks - we could be looking at Christmas. Hopefully less."